Optical member and lighting device using the same

ABSTRACT

Provided are an optical member capable of implementing optical images having desired shapes through a pattern design, and a lighting device using the same, the optical member including: a three-dimensional effect forming portion provided on a first surface of a base substrate; and a multiple effect forming portion disposed in a lamination form with the three-dimensional effect forming portion, wherein the three-dimensional effect forming portion has multiple main patterns sequentially arranged in a first direction on the first surface and having respective inclined surfaces with an inclination angle with respect to the first surface, wherein the multiple main patterns implement a line shaped beam of a first path by guiding a first incident beam into a first surface direction through refraction or reflection from the inclined surfaces, wherein the multiple effect forming portion are sequentially arranged in a second direction crossing the first direction and has multiple optical patterns.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. §119 to KoreanApplication No. 10-2013-0164889 filed on Dec. 27, 2013, in the KoreanIntellectual Property Office, whose entire disclosure is herebyincorporated by reference.

BACKGROUND

1. Field

Embodiments of the present disclosure relate to an optical member and alighting device using the same capable of implementing an optical imagehaving a desired shape via a pattern design.

2. Background

In general, a lighting device is a device used for lightening a darkplace using various light sources. The lighting device is used to shinea beam at a specific object or space and to express an atmosphere of thespecific object or space in a desired shape or color.

According to the technical development of an LED (Light Emitting Diode),lighting devices in various shapes using the LED have recently come intowide use. For example, one of the lighting devices according to aconventional art includes a diffusion plate for emitting light emittedfrom LED light sources to the outside.

Most of the LED lighting devices according to the conventional art areconfigured so that light is uniformly outputted on an entire lightemitting surface. Also, in order to express the atmosphere of a specificobject or space in a desired shape or color, a color filter or a filterhaving a light permeable hole in a desired shape has been used in somelighting devices according to the conventional art.

However, when the atmosphere of a specific object or space is expressedin a desired shape or color using the LED lighting devices according tothe conventional art, the configuration of the devices becomesmechanically complicated, and as a result, it is problematic in that thedegree of freedom in design is limited, and it is difficult to installor maintain and manage the devices. As such, in order to express theatmosphere in a desired shape or color or an optical image, a lightdevice having a simple structure, which is easy to install or maintainand manage, has been required.

BRIEF DESCRIPTION OF THE DRAWINGS

The embodiments will be described in detail with reference to thefollowing drawings in which like reference numerals refer to likeelements wherein:

FIG. 1 is a perspective view of an optical member according to anembodiment of the present disclosure;

FIG. 2 is a cross-sectional view taken along line II-II of the opticalmember of FIG. 1;

FIG. 3 is a partially cross-sectional view of the optical member of FIG.1 and a partially enlarged view thereof.

FIG. 4 is a view for explaining the principles of refraction andreflection of the optical member of FIG. 1;

FIG. 5 is a view for explaining the principle of generation in aline-shaped light beam of the optical member of FIG. 1;

FIG. 6 is a view showing brightness for each area regarding athree-dimensional effect light beam of the optical member of FIG. 1;

FIG. 7 is a plan view of an optical member according to anotherembodiment of the present disclosure;

FIG. 8 is a partially enlarged view of main patterns which can beapplied to the optical member according to the embodiment of the presentdisclosure;

FIG. 9 is a partially enlarged view showing another embodiment of themain patterns of FIG. 8;

FIG. 10 is a partially enlarged view showing a further embodiment of themain patterns of FIG. 8;

FIG. 11 is a plan view showing a part of a lighting device according toan embodiment of the present disclosure;

FIG. 12 is a plan view showing a part of a lighting device according toanother embodiment of the present disclosure;

FIG. 13 is a view schematically showing an operational status of thelighting device of FIG. 12;

FIG. 14 is a view regarding the operational status of the lightingdevice of FIG. 12;

FIG. 15 is a graph in which brightness of the lighting device of FIG. 12is measured;

FIG. 16 is a perspective view of a lighting device according to afurther embodiment of the present disclosure;

FIG. 17 is a plan view of the lighting device of FIG. 16;

FIG. 18 is a cross-sectional view for explaining the principles ofgenerating of a single line-shaped beam or three-dimensional effectbeam;

FIG. 19 is a cross-sectional view for explaining the principles ofgeneration of multiple line-shaped beams or three-dimensional effectbeams in each area of the lighting device of FIG. 16;

FIG. 20 is a plan view regarding an operational status of the lightingdevice of FIG. 16;

FIG. 21 is a view regarding an operational status of the lighting deviceof FIG. 16;

FIG. 22 is a cross-sectional view of a lighting device of yet anotherembodiment of the present disclosure;

FIG. 23 is a plan view of a lighting device of still another embodimentof the present disclosure; and

FIG. 24 is a partially cross-sectional view of an optical memberaccording to a further embodiment of the present disclosure.

DETAILED DESCRIPTION

Hereinafter, the embodiments of the present disclosure that an ordinaryperson skilled in the art can implement will be described with referenceto the accompanying drawings. The embodiments in the specification andthe constructions shown in the drawings are provided as a preferredembodiment of the present disclosure, and it should be understood thatthere may be various equivalents and modifications which couldsubstitute at the time of filing. In addition, when it comes to theoperation principle of the preferred embodiments of the presentdisclosure, when the known functions or functions are seemed to makeunclear the subject matters of the present disclosure, they will beomitted from the descriptions of the disclosure. The terms below aredefined in consideration of the functions of the present disclosure, andthe meaning of each term should be interpreted by judging the wholeparts of the present specification, and the elements having the similarfunctions and operations of the drawings are given the same referencenumerals.

FIG. 1 is a perspective view of an optical member according to anembodiment of the present disclosure.

Referring to FIG. 1, an optical member 100 according to the presentembodiment is configured to include: a base substrate 10; athree-dimensional effect forming portion 11; and a multiple effectforming portion 12.

The base substrate base substrate 10 is provided in a transparent plateform or a film form and has both surfaces, namely, a first surface and asecond surface. The first surface may be referred to as a first patternarrangement surface, and the second surface may be referred to as asecond pattern arrangement surface.

The three-dimensional effect forming portion 11 is provided on the firstsurface of a lower side of the base substrate 10, and the multipleeffect forming portion 12 is provided on the second surface of an upperside of the base substrate 10.

A transparent material, for example, a polymer which is easy tomanufacture and handle, may be used as a material of the base substrate10. The polymer includes a thermoplastic polymer, a thermosettingpolymer or a photocurable polymer. The polymer may be selected frompolycarbonate, polymethylmethacrylate, polystyrene, polyethyleneterephthalate and the like. Also, a transparent material such as glassand the like may be used as the material of the base substrate 10. As atransparent material, the base substrate 10 may have a lighttransmittance beyond a predetermined value or a haze of 2% or less.

The three-dimensional effect forming portion 11 is configured to includethe multiple main patterns 111 provided on the first surface of the basesubstrate 10. The multiple main patterns 111 have multiple convexstructures or multiple concave structures that are roughly parallel tothe first surface and extend in roughly a first direction (y-direction),respectively. That is, the three-dimensional effect forming portion 11is configured to include multiple main patterns 111 that are roughlyparallel to the first surface and are sequentially arranged in a seconddirection (x-direction) which crosses at right angles to the firstdirection. The multiple main patterns 111 have inclined surfaces (seereference numeral 113 of FIG. 3) with each inclination angle withrespect to the first surface or a surface or straight line vertical tothe first surface.

The multiple effect forming portion 12 is provided in a lamination formwith the three-dimensional effect forming portion 11. In the presentembodiment, the multiple effect forming portion 12 is configured toinclude multiple optical patterns 121 provided on the second surface ofthe base substrate 10. The multiple optical patterns 121 have multipleconvex structures or multiple concave structures that are roughlyparallel to the second surface and extend in roughly a second direction(x-direction), respectively. That is, the multiple effect formingportion 12 is configured to include the multiple optical patterns 121that are roughly parallel to the second surface and are sequentiallyarranged in the first direction (y-direction) which crosses at rightangles to the second direction.

According to a pattern design of the multiple main patterns 111, whenlight is irradiated to the optical member 100, the multiple mainpatterns 111 of the three-dimensional effect forming portion 11implements a line-shaped beam of a first path which crosses at rightangles to pattern extension directions by guiding a first incident beamto a first surface direction toward which the first surface looks or asecond surface direction toward which the second surface of the basesubstrate 10 opposite to the first surface looks using refraction andreflection generated from the inclined surfaces.

Also, according to a pattern design of the multiple optical patterns121, when light is irradiated to the optical member 100, a singleline-shaped beam or a single three-dimensional effect beam emitted fromthe multiple main patterns 111 of the three-dimensional effect formingportion 11 may be converted into multiple line-shaped beam or multiplethree-dimensional effect beam.

The principles of generation of the single line-shaped beam, the singlethree-dimensional effect beam, the multiple line-shaped beams and themultiple three-dimensional effect beams will be described in greaterdetail with reference to the drawings.

FIG. 2 is a cross-sectional view taken along line II-II of the opticalmember of FIG. 1. FIG. 3 is a partially cross-sectional view of theoptical member of FIG. 1 and a partially enlarged view thereof. Forconvenience of the description, the optical member of FIG. 3 isillustrated in a state of the multiple effect forming portion beingomitted.

Referring to FIGS. 2 and 3, when light is irradiated from apredetermined light source of a left side of the ground to the opticalmember of the present embodiment, the multiple main patterns 111 of thethree-dimensional effect forming portion, that have a larger refractiveindex n2 than a refractive index n1 of air and are provided on the firstsurface of the base substrate 10, refract and reflect light from theinclined surfaces.

In the aforesaid case, the light passing through the multiple mainpatterns 111 of the three-dimensional effect forming portion 11 isguided into a specific optical path and is limited to a specific opticalwidth by refraction and reflection generated from the inclined surfacesof the main patterns according to a pattern design of the main patterns.The specific optical path refers to a moving path of light guided in adirection which crosses at right angles to the extension direction ofeach of the main patterns. The optical path includes a first path inwhich the light moves along a sequential arrangement direction of themain patterns. The generation of this optical path is based on theFermat's principle that a ray of light passing along thethree-dimensional forming portion 21, namely, a ray of light passingalong a medium, travels along a movement path that can be traversed inthe least time. Furthermore, the specific optical width may be limitedin a desired shape through a pattern design of main patterns forcontrolling pattern conditions, such as a between adjacent two mainpatterns and the like. For example, the specific optical path and thespecific optical width may be implemented to extend to the extent of afirst length while having a fixed width according to a pattern design,may be implemented to extend to the extent of a second length shorterthan the first length while having an optical width which reducesgradually, or may be implemented to be similar to the first length or tobe shorter or longer than the first length while having an optical widthwhich increases gradually.

Also, by refraction and reflection of the inclined surfaces, themultiple main patterns 111 of the three-dimensional effect formingportion 11 may function as indirect light sources in which brightnessreduces as a distance L1, L2, L3 from the light source increasesgradually as viewed from the outside of the base substrate 10. That is,the indirect light sources generated from a specific portion of themultiple main patterns refer to dummy light sources LS1, LS2, LS3 whichare sequentially arranged along the optical path of the light source,and in which the intensity of light reduces as a distance from the lightsource increases gradually. Here, the specific portion corresponds to aportion where each of the inclined surfaces of the main patterns crossesat right angles to the light of the light source.

More specifically, as illustrated in FIG. 3, the multiple patterns 111serve as indirect light sources in which optical paths become longer inorder as a distance from the light source LS increases gradually,thereby creating a three-dimensional effect beam in a thicknessdirection (z-direction) of the base substrate 10. The thicknessdirection of the base substrate 10 may be a direction which crosses atright angle to a pattern extension direction (x-direction) and a firstdirection (y-direction).

In other words, when the multiple patterns 111 include first patterns,second patterns and third patterns in a first area A1, a second area A2and a third area A3 sequentially arranged from the light source LS, asecond optical path of the second patterns is longer than a firstoptical path of the first patterns and is shorter than the third opticalpath of the third patterns, a second distance L2 from a second dummylight source LS2 of the light source by inclined surfaces of the secondpatterns to the inclined surfaces of the second patterns is longer thana first distance L1 from a first dummy light source LS1 of the lightsource by inclined surfaces of the first patterns to the inclinedsurfaces of the first patterns, and is shorter than a third distance L3from a third dummy light source LS3 of the light source by inclinedsurfaces of the third patterns to the inclined surfaces of the thirdpatterns. According to such a configuration, the multiple pattern 111implement three-dimensional effect beams showing a form in which opticalpaths increases as a distance from the light source increases graduallyin a length direction of the line shape beam, and accordingly, as viewedfrom an arbitrary point (a standard point or an observing point) in adirection roughly vertical to the first surface or the patternarrangement surface (see reference numeral 112 of FIG. 9), the distancefrom the light sources increases as the optical path increasesgradually.

Referring to FIG. 2 again, the multiple main patterns of the multipleeffect forming portion 12 are configured to include the multiple opticalpatterns disposed in a lamination form with the multiple main patterns.The multiple optical patterns may be provided in the same structure andthe same form as those of the multiple main patterns except for the factthat extension directions of the multiple optical patterns cross theextension directions of the multiple main patterns or meet at rightangles to the extension directions of the multiple main patterns.According to this configuration, the multiple optical patterns mayconvert a line-shaped beam or a three-dimensional effect beam of thefirst path, refracted and reflected from the multiple main patterns intoa first line-shaped beam (or a first three-dimensional effect beam) anda second line-shaped beam (or a second three-dimensional effect beam)which cross the first path in different directions.

According to the optical member of the present embodiment, a singleline-shaped beam or a single three-dimensional effect beam may beimplemented by the three-dimensional effect forming portion 11, and thesingle line-shaped beam or the single three-dimensional effect beam maybe converted into multiple line-shaped beams or multiplethree-dimensional effect beams by the multiple effect forming portion12.

Meanwhile, according to the embodiment, the second main patterns may bepatterns positioned right after first main patterns on the patternarrangement surface 112 as viewed from the light source LS or may bepatterns positioned with the first main patterns and other main patternsin a predetermined number therebetween. Similarly, third main patternsmay be patterns positioned right after the second main patterns on thepattern arrangement surface as viewed from the light source LS or may bepatterns positioned with the second main patterns and other mainpatterns in a predetermined number therebetween.

Also, the aforesaid three-dimensional effect beam may refer to anoptical image having a sense of distance or a perceptional depth, whichis configured such that a line-shape beam of a predetermined opticalpath (the first path) gradually enters the base substrate 10, namely,from the first surface of the base substrate 10 toward the secondsurface of the base substrate 10, as viewed from the first surfacedirection or the second surface direction. Furthermore, thethree-dimensional effect beam may be one example of a line-shaped beamand may be another name for a specific optical image of the line-shapedbeam.

Also, according to the present embodiment, the aforesaid multiple mainpatterns 111 and the multiple optical patterns are provided by removinga part of the first surface and a part of the second surface of the basesubstrate 10, but the present disclosure is not limited to theconfiguration. That is, according to some embodiments, the multiple mainpatterns 111 may be provided by a separate pattern layer bonded to thefirst surface of the base substrate 10.

FIG. 4 is a view for explaining the principles of refraction andreflection of the optical member of FIG. 1.

Referring to FIG. 4, the light, which meets with the inclined surfaces(see reference numeral 113 of FIG. 9) of the respective main patterns111 of the three-dimensional effect forming portion 11 shown in FIG. 3,is refracted or is reflected according to an incidence angle thereof.That is, when the incidence angle is smaller than a critical angle θc,the light is refracted according to a difference in refractive indexwhile penetrating the main patterns. When the incidence angle is greaterthan a critical angle θc, the light is reflected from the main patterns.

A relation between the refractive index and the critical angle may berepresented by following Equations 1 and 2.

$\begin{matrix}{n = {\frac{n\; 1}{n\; 2} = \frac{\sin \; \theta_{c}}{\sin \; 90{^\circ}}}} & {{Equation}\mspace{14mu} 1} \\{{\sin \; \theta_{c}} = \frac{n\; 1}{n\; 2}} & {{Equation}\mspace{14mu} 2}\end{matrix}$

Here, when n1 is a refractive index of air, n2 is a refractive index ofa medium (base substrate), a critical angle is represented by thefollowing Equation 3.

$\begin{matrix}{{\sin \; \theta_{c}} = \frac{1}{n\; 2}} & {{Equation}\mspace{14mu} 3}\end{matrix}$

When the principle of the reflection and refraction from the inclinedsurfaces is used, the inclined surface 113 of each of the multiple mainpatterns guides an incident beam in a first surface direction towardwhich the first surface of the base substrate 10 looks and/or in asecond surface direction toward which the second surface 102 opposite tothe first surface looks, by refracting and reflecting the incident beamaccording to each inclination angle θc. To do so, the inclined surfaceof each of the multiple patterns is provided to have a predeterminedsurface roughness in order implement optical images having desired shapethrough a pattern design.

That is, when using the multiple main patterns for guiding the beam inthe first surface direction or the second surface direction byrefracting and reflecting the incident beam via the inclined surfacehaving the predetermined surface roughness, the optical path, theoptical width, luminous intensity of the incident beam may becontrolled, and accordingly, line shaped beams, three-dimensional effectbeams or line shaped beams with a three-dimensional effect havingdesired shapes may be implemented.

In the present embodiment, the inclined surface (see reference numeral113 of FIG. 8) may be a mirror-like finishing surface. Also, theinclined surface may be a precision processing surface. In other words,with regard to the surface roughness of the inclined surface, eventhough there is a slight difference according to each processing method,a roughly center line average roughness or an arithmetic mean roughnessRa may be about 0.02 or less, and a maximum height roughness Rmax may beabout 0.3. According to some embodiments, the surface roughness of theinclined surface 113 may be a ten point median height Rz of 0.8 or less.Here, the unit of roughness may be μm and a standard length may be 0.25mm

The surface roughness of the inclined surface is intended to secure areflectance of the inclined surface in a range beyond a predeterminedvalue. When the surface roughness shows a larger surface roughness thanthe value described above, it is difficult to properly implement a lineshaped beam due to the scattering of light or light beyond a fixedamount returning from the inclined surface to the light source.

According to the present embodiment, a refractive index and an criticalangle may be changed according to a material of the base substrate, andthus a single line-shaped beam or a three-dimensional effect beamresulting from a single light source may be implemented by appropriatelydesigning a structure (inclined surfaces and the like) or arrangement ofthe main patterns 111 of the three-dimensional effect forming portion 11and controlling the efficiency of refraction and reflection from themultiple main patterns 111, and the single line-shaped beam or thethree-dimensional effect beam may be converted into multiple line-shapedbeams or multiple three-dimensional effect beams via the opticalpatterns (reference numeral 121 of FIG. 1) of the multiple effectforming portion 12.

FIG. 5 is a view for explaining the principle of generation in aline-shaped light beam of the optical member of FIG. 1. FIG. 5 maycorrespond to a partially enlarged view of the multiple main patternswhen viewing the three-dimensional effect forming portion 11 of the basesubstrate 10 on a plane.

Referring to FIG. 5, when the multiple main patterns are sequentiallyarranged from the light source LS in the y-direction, light (firstincident beam) of the light source LS is implemented as a line-shapedbeam B1 that travels in a direction crossing at right angles to thepattern extension directions P1, P2, P3, P4 of the multiple mainpatterns. A distance Lp (which may correspond to a pitch) between twoadjacent main patterns may be about 10 to 500 μm. This distance Lp isbased on a minimum distance and a maximum distance for forming a lineshaped beam or a three-dimensional effect beam, and when the distance isbeyond the range, it is difficult to implement a line-shaped beam or athree-dimensional effect beam.

Also, according to implementation of the line shaped beam through apattern design, the multiple main patterns guides the second incidentbeam in a direction expect for the first path by refraction andreflection from the inclined surfaces. Here, among beams from the lightsource LS toward the inclined surfaces, the second incident beam may bea beam (hereinafter referred to as ‘an ambient beam’) that meets withthe inclined surfaces having an incidence angle corresponding to adirection (for example, a direction toward a first quadrant and a fourthquadrant of both sides of the line-shape beam in the first path thattravels to an +y axis on an xy plan based on the light source) roughlybetween a +y direction and a +x direction, and a +y direction and a −xdirection on a plan defined by the pattern extension directions and thefirst path, and is refracted or is regularly reflected by the inclinedsurfaces. In this case, since the second incident beam is dispersed in arelatively wide range by the inclined surfaces, as viewed from anarbitrary point (a standard point, an observing point and the like) on astraight line crossing the xy plan (corresponding to the first surfaceor the second surface of the base substrate), the second incident beambecomes ambient beams B2, B3 in which brightness of the periphery of abright part is relatively low compared to that of a line shaped beampart (hereinafter referred to as “the bright part) resulting from thefirst incident beam.

According to the present embodiment, each of the pattern extensiondirections P1, P2, P3, P4 of the main patterns may be a direction inwhich a specific straight line of each inclined surface of the multiplemain patterns extends or a direction in which a specific tangent line incontact with a curved line of each inclined surface extends. Therespective pattern extension directions P1, P2, P3, P4 may be parallelto the first surface of the base substrate.

That is, when the respective pattern extension directions P1, P2, P3, P4of the multiple main patterns are designed to be parallel to each otherupon designing the pattern extension directions, the optical path (thefirst path) of light passing through the multiple main patterns has astraight line form in which the light starts from a main pattern whichfirst meets with incident beam of the light source, and travels in adirection which crosses at right angles to each pattern extensiondirection.

Also, according to some embodiments, when the respective patternextension directions P1, P2, P3 P4 of the multiple main patterns aredesigned to cross each other from at least one point or to extend in aradial direction (see FIG. 7), the optical path (the first path) oflight passing along the multiple main patterns may be implemented in acurved line form in which the light start from a main pattern of a pointwhich first meets with the light of the light source and is bent to aside in which a distance between the adjacent main patterns reducesgradually.

FIG. 6 is a view showing brightness for each area regarding athree-dimensional effect light beam of the optical member of FIG. 1.

Referring to FIG. 6, with regard to the multiple main patterns of theoptical member according to the present embodiment, by dividing themultiple main patterns sequentially arranged from the light source intothe main patterns of three areas (see A1, A2, and A3 of FIG. 3), whenbrightness resulting from reflection and refraction of the main patternsof the respective areas has been reviewed, each of the multiple mainpatterns have brightness in ranges different from each other accordingto each distance from the light source.

In other words, when the multiple main patterns are divided into thefirst main patterns of the first area A1, the second main patterns ofthe second area A2, and the third main patterns of the third area A3(see FIG. 3), a second brightness of the second main patterns is lowerthan a first brightness of the first main patterns, and is higher than athird brightness of the third main patterns. Here, a second distance L2between the light source and the main pattern farthest away from thelight source among the second main patterns is longer than a firstdistance L1 between the light source and the main pattern farthest awayfrom the light source among the first main patterns and is shorter thana third distance L3 between the light source and the main patternfarthest away from the light source among the third main patterns.

More specifically, when a maximum brightness of the closest main patternto the light source is level 10 Lu10, the specific first main patternpositioned at the first distance L1 from the light source may have abrightness of about level 8 Lu8, level 7 Lu7, level 6 Lu6, level 5 Lu5or level 4 Lu4 according to different pattern designs of the first tofifth embodiment. The specific second main pattern positioned at thesecond distance L2 from the light source may have a brightness of aboutlevel 6 Lu6, level 4 Lu4, level 2 Lu2, or level 1 Lu1 according topattern designs. Furthermore, the specific third main pattern positionedat the third distance L3 from the light source may have a brightness ofabout level 2 Lu2, level 1 Lu1, or level 0 (no brightness).

That is, with regard to the multiple main patterns of the optical member100 previously described with reference to FIGS. 1 to 3, the respectivemultiple main patterns emit beams having predetermined brightness byrefracting and reflecting the beams of the light sources, and this isbecause the multiple main patterns serve as indirect light sourceshaving different kinds of brightness which are sequentially reducedaccording to a pattern design or an arrangement structure.

Referring to FIG. 6 again, for example, as shown in a brightness curveG1 of a first embodiment, according to a predetermined pattern design ofthe first embodiment, the first patterns, the second patterns and thethird patterns serve as indirect light sources having brightness valuesof about level 7, level 4 and level 1, respectively. According to thisconfiguration, as a distance from the light source increases gradually,the multiple main patterns may implement three-dimensional effect beamshaving brightness values which are substantially regularly reduced. Inorder to implement the three-dimensional effect beams, the multiple mainpatterns may be designed in a fixed pitch.

Also, according to a pattern design of the main patterns of a secondembodiment, as shown in brightness curve G2 of the second embodiment,the first patterns, the second patterns and the third patterns serve asindirect light sources having brightness values of about level 6, level3 and level 0, respectively. According to this configuration, themultiple main patterns may implement three-dimensional effect beamshaving brightness values which are regularly rapidly reduced as adistance from the light source increases gradually. In order toimplement the three-dimensional effect beams, the multiple main patternsmay be designed such that as a distance from the light source increasesgradually, a pitch reduces or a pattern density per a unit lengthincreases at a fixed rate.

Also, according to a pattern design of a third embodiment, as shown in abrightness curve G3 of the third embodiment, the first patterns, thesecond patterns and the third patterns serve as indirect light sourceshaving respective brightness values of about level 5, level 2, and level1. According to such a configuration, the multiple patterns mayimplement three-dimensional effect beams in which a brightness reductionrate between the first area A1 and the second area A2 is larger than abrightness reduction rate between the second area A2 and the third areaA3 as a distance from the light source increases gradually. In order toimplement the three-dimensional effect beams, the multiple patterns maybe designed in a fixed pitch which is narrower than the pitch of thefirst embodiment, or may be provided such that a pitch is graduallyincreased according to an increase in distance from the light source.

Also, according to a pattern design of a fourth embodiment, as shown ina brightness curve G4 of the fourth embodiment, the first patterns, thesecond patterns and the third patterns serve as indirect light sourceshaving respective brightness values of about level 4, level 1, and level0. According to such a configuration, the multiple main patterns mayimplement three-dimensional effect beams in which brightness is furtherrapidly reduced relatively compared to the case of the third embodiment.In order to implement the three-dimensional effect beams, the multiplemain patterns may be designed in a fixed pitch narrower than the pitchof the third embodiment, or may be provided such that a pitch isgradually reduced according to an increase in distance from the lightsource.

Also, according to a pattern design or an arrangement structure of afifth embodiment, as shown in a brightness curve G3 of the fifthembodiment, the first patterns, the second patterns and the thirdpatterns serve as indirect light sources having respective brightnessvalues of about level 8, level 6, and level 2. According to such aconfiguration, the multiple patterns may implement three-dimensionaleffect beams in which a brightness reduction rate between the first areaA1 and the second area A2 is smaller than a brightness reduction ratebetween the second area A2 and the third area A3 as a distance from thelight source increases gradually. In order to implement thethree-dimensional effect beams, the multiple main patterns may bedesigned in a fixed pitch which is wider than the pitch of the firstembodiment, or may be provided such that a pitch is gradually reducedaccording to an increase in distance from the light source.

In the aforesaid first to five embodiments, it is assumed that therespective embodiments are identical to each other with respect to thepattern structures and reflection abilities of the inclined surfaces ofthe respective main patterns for the respective embodiments. When thereis a difference in the pattern structures and the reflection abilitiesamong the patterns, by adjusting a pattern design in consideration ofthis fact, three-dimensional effect beams having brightness which isnaturally reduced may be obtained by the indirect light source effectsof the multiple main patterns sequentially arranged.

According to the present embodiment, thanks to the effect of thereduction in brightness and the effect of the indirect light sources ofthe main patterns resulting from a difference in a distance from thelight source, namely, a difference in optical paths, a line shaped beam,a three-dimensional effect beam or a line-shaped beam with athree-dimensional effect can be implemented.

FIG. 7 is a plan view of an optical member according to anotherembodiment of the present disclosure.

Referring to FIG. 7, the three-dimensional effect forming portion 11 ofthe optical member according to the present embodiment is configured toinclude the multiple main patterns provided in a structure in whichpattern arrangement directions cross each other from the patternarrangement surface of the base substrate 10. The multiple main patternsinclude a first main pattern C1, a second main pattern C2, a third mainpattern C3, an n-second main pattern Cn-2, an n-first main pattern, andan nth main pattern Cn in order of the location nearest to the lightsource. Here, n is a natural number of 6 or more.

In the present embodiment, the multiple main patterns are arranged toextend in directions which are not parallel to each other. That is, withregard to the respective pattern extension directions of the multiplemain patterns, virtual extension lines thereof may meet at one point ofintersection C.

According to the present embodiment, when light of the light sourcepasses through the three-dimensional effect forming portion 11, themultiple main patterns may implement a line-shaped beam BL1 of the firstpath (optical path) which is bent with a curvature to a side in whichthe pattern extension directions cross each other, namely, a side in thewhich an intersecting point C is present. This is because the lighttravels along a direction meeting at right angles to each of the patternextension direction of the multiple main patterns according to theFermat's principle that ‘a ray of light traveling in a medium travelsalong a movement path that can be traversed in the least time.’

Also, according to the present embodiment, when an observing point or afixed standard point of an observer (a person, a camera or the like) whoobserves the line shaped beam BL1 of the first path is moved from afirst point Pa to a second point Pb, the multiple main patternsexpresses a line shaped beam BL2 traveling along another optical pathinstead of the line shaped beam BL1 traveling along the first path. Thisis because the position of the first path meeting at right angles to thepattern extension directions of the multiple main patterns is moved to adirection opposite to the movement direction of the standard pointaccording to a change of the standard point. As such, the multiple mainpatterns may implement the line-shaped beam having various opticalimages expressed by moving along the pattern extension directions of themultiple main patterns according to a standard point or an observingpoint.

Also, according to the present embodiment, the line-shaped beam BL1 orBL 2 of a single optical path may be implemented as a first line-shapedbeam and a second line-shaped beam of two different optical paths by themultiple effect forming portion disposed in a lamination structure withthe three-dimensional effect forming portion 11, even though this is notillustrated in the drawings for convenience of the description.

FIG. 8 is a partially enlarged view of main patterns which can beapplied to the optical member according to the embodiment of the presentdisclosure.

Referring to FIG. 8, the main pattern 111 of the three-dimensionaleffect forming portion according to the present embodiment may beprovided so as to have a pattern structure of a triangular section form.When the main pattern 111 has the triangular section structure, theinclined surface 113 has a predetermined inclination angle in they-direction of the pattern arrangement surface (see reference numeral112 of FIG. 9). In other words, the inclined surface 113 may be providedto be bent at a predetermined inclination angle θ with respect to adirection (z-direction) which crosses at right angles to the patternarrangement surface.

The inclination angle θ is larger than about 5° and smaller than about85°. The inclination angle θ may be further limited in consideration ofa refractive index of the base member, but the inclination angle may bebasically appropriately designed in the range of about 5° to 85° interms of an inclination angle which enables reflection and refractionfrom the inclined surface.

In one embodiment, when a refractive index of the base substrate isabout 1.30 to 1.80, an inclination angle of the inclined surface 113 ofeach main pattern 111 may be larger than 33.7° and smaller than 50.3°,or may be larger than 49.7° and smaller than 56.3° according to eachstandard direction.

Also, in another embodiment, the base substrate or the multiple mainpatterns may be made of a material having a high refractive index. Forexample, in the case of manufacturing high intensity LEDs, when a ray oflight having a specific incidence angle penetrates a capsule material bypassing along a semiconductor die, total internal reflection isperformed due to a difference in an n value (a refractive index) betweenthe semiconductor die (n=2.50˜3.50) and a general polymeric capsuleelement (n=1.40˜1.60), and accordingly, light extraction efficiency ofthe device is reduced. Thus, in order to properly solve this problem, ahigh refractive index polymer (n=1.80˜2.50) is used. In the presentembodiment, the multiple main patterns may be provided by utilizing thehigh refractive index polymer (n=1.80˜2.50) used in manufacturing highintensity LEDs. In this case, the inclination angle of the inclinedsurface 113 of each main pattern 111 may be larger than 23.6° andsmaller than about 56.3° according to each refractive index of themultiple main patterns.

Also, according to some embodiments, in order to adjust a refractiveindex, the multiple main patterns may be coated with at least one layerhaving a high refractive index.

The inclination angle resulting from the refractive index is based onthe Snell's law, and the Snell's law is represented by the followingEquation 4 with reference to FIG. 3.

$\begin{matrix}{\frac{\sin \; \theta_{1}}{\sin \; \theta_{2}} = \frac{n\; 2}{n\; 1}} & {{Equation}\mspace{14mu} 4}\end{matrix}$

In Equation 4, sin θ1 is a traveling angle or an incidence angle oflight shown in a first refractive index n1, and sin θ2 is an incidenceangle or a traveling angle of light shown in a second refractive indexn2.

As previously described, the inclined surface of each of the multiplemain patterns in the present embodiment may be provided to have aninclination angle ranging from about 5° to about 85° as an inclinationangle which enables an incident beam to be reflected or refractedappropriately.

Also, in the present embodiment, each main pattern 111, in addition tothe inclination angle of the inclined surface, a pitch or a rate of awidth w to a height h of a bottom surface may be limited to a fixed ratefor convenience of a manufacturing process.

For example, when the optical member is implemented so as to emphasize acubic effect of the three-dimensional effect beam, the width w may beprovided to be equal to or smaller than the height h. Also, when theoptical member is implemented so as to obtain a relatively long image ofthe three-dimensional effect beam, the width w may be provided to belarger than the height h.

Also, for example, when each main pattern 111 has a lenticular form, arate (h/w) of a width to a height of the main pattern 111 of the presentembodiment may be about ½ or less, or an inclination angle θ of theinclined surface thereof may be about 60° or less.

As such, in the present embodiment, by using the width w and the heighth of each pattern 111 as factors for property adjustment, optical imagesof the line shaped beam, the three-dimensional effect beam or the likeintended to be expressed by the lighting device may be efficientlycontrolled.

In the present embodiment, among the aforesaid multiple patterns, awidth w (which may correspond to a pitch) between two adjacent patternsmay be 10 to 500 μm. This width (or distance) may refer to an averagedistance among the multiple main patterns of the first path, and may beselected and adjusted according to a pattern design, an arrangementstructure or a desired optical image form.

Also, according to some embodiments, the multiple main patterns may beconfigured to be concavely inserted into the first surface of the basemember or the inside of the base member in the pattern arrangementsurface. In this case, each inclined surface of the patterns as the casedescribed above has an inclination angle with respect to the patternarrangement surface or the z-direction, and when a rate (h/w) of a widthto a height of each of the patterns is designed to be about 1 or less,it may be easy to produce the patterns compared to the case in which arate (h/w) of the width to the height of each of the patterns is 1 ormore.

FIG. 9 is a partially enlarged view showing another embodiment of themain patterns of FIG. 8.

Referring to FIG. 9, when designing the three-dimensional effect formingportion 11, each of the multiple main patterns 111 may be provided tohave a pattern structure of a semicircular or semielliptical sectionform. Each main pattern 111 has an inclined surface which is inclined ata predetermined angle in a thickness direction (z-direction) of the basesubstrate or a direction (y-direction) in which the first surface or thepattern arrangement surface 112 extends. Each main pattern 111 may havea symmetrical form based on a central line (not drawn) in a z-direction.

The inclined surface of the main pattern 111 may have a structure inwhich an inclination angle is changed according to a position on theinclined surface by a semicircular structure of the main patterns. Thatis, since the inclined surface of each of the main patterns 111 is asurface in contact with an arbitrary point on a circular arc, a tangentline in contact with an arbitrary point on each of the main patterns 111or a surface in contact with the arbitrary point may be placed at afixed inclination angle θ in the direction (the z-direction) meeting atright angles to the pattern arrangement surface 112. The inclinationangle θ may be larger than 0° and smaller than 90° according to eachposition of a circular cross section which the beam BL hits.

Also, the three-dimensional effect forming portion 11 of the presentembodiment may be configured to further include a separation portion 102provided between two adjacent main patterns. That is, when the multiplemain patterns include a first main pattern Cm−1, a second main patternCm, and a third main pattern Cm+1 (wherein m is a natural number of 2 ormore), the three-dimensional effect forming portion 11 may include eachseparation portion 102 between the first main pattern Cm−1 and thesecond main pattern Cm and between the second main pattern Cm and thethird main pattern Cm+1.

The separation portion may be a part of the pattern arrangement surfacepositioned between two adjacent main patterns as a part of the patternarrangement surface 112 of the base substrate in which concave mainpatterns are not formed. Also, the separation portion 102 may beprovided for convenience of a manufacturing process as a gap between twoadjacent main patterns. The separation portion 102 may be omittedaccording to the manufacturing process or a pattern design for specificimplementation.

A width w1 of the separation portion 102 is smaller than a width w ofthe main pattern 111. The width w1 of the separation portion 102 may beabout ⅕ or less or several μm of the width w of the main pattern 111.

FIG. 10 is a partially enlarged view showing a further embodiment of themain patterns of FIG. 8.

Referring to FIG. 10, when designing the three-dimensional effectforming portion 11 of the optical member of the present embodiment, themultiple main patterns 111 may be provided so as to have a patternstructure of a polygonal cross section form. The inclined surface 113 ofeach of the main patterns 111 may have a broken line graph form.

In the present embodiment, the inclined surface 113 of each main pattern111 may be provided to have multiple inclination angles θ1, θ2 accordingto the number of segments of the curved line graph in the direction(z-direction) which crosses at right angles to the pattern arrangementsurface 112. The second inclination angle θ2 may be larger than thefirst inclination angle θ1. The first and second inclination angles θ1,θ2 may be designed within the range which is larger than about 5° andsmaller than about 85° according to a position where the beam BL hits.

Also, the three-dimensional effect forming portion 11 of the presentembodiment may be configured to further include the separation portion102 provided between two adjacent main patterns. That is, when themultiple patterns include the first pattern Cm−1, the second pattern Cmand the third pattern Cm+1, the three-dimensional effect forming portion11 may have the respective separation portion 102 between the firstpattern Cm−1 and the second pattern Cm and between the second pattern Cmand the third pattern Cm+1.

A width w1 of the separation portion 102 is smaller than a width w ofthe main pattern in order to implement natural line shaped beams orthree-dimensional effect beams via the three-dimensional effect formingportion 11. The width w1 of the separation portion 102 is may be about ⅕or less or several μm or less of the width w of the main pattern. When aline shaped beam or a three-dimensional effect beam having a desiredshape (a shape without an interruption or the like) is implementedthrough a design of the multiple main patterns, the width w1 of theseparation portion 102 may be designed to be narrow maximally or may bedesigned so that the separation portion 102 can be omitted. When theseparation portion 102 is provided, the pattern separation portion 102is designed to have the width w1 of several μm or less.

Also, the three-dimensional effect forming portion 11 of the presentembodiment may have an interrupted surface 115 parallel to the firstsurface or the pattern arrangement surface 113 of the respective mainpatterns. The interrupted surface 115 is a part which does not functionto enable light to be substantially emitted to the outside through thereflection or refraction of incident beam. Thus, since a line-shapedbeam implemented by the multiple main patterns may have an interruptedpart corresponding to the interrupted surface 115, a width w2 of theinterrupted surface 115 may be appropriately designed in a range ofbelow several μm in order to implement a line-shaped beam having adesired shape.

FIG. 11 is a plan view showing a part of a lighting device according toan embodiment of the present disclosure. For convenience of thedescription, the lighting device of FIG. 11 has a structure in which themultiple effect forming portion is omitted.

Referring to FIG. 11, a lighting device 200 according to the presentembodiment is configured to include an optical member 100 and a lightsource portion 230. The lighting device 200 has a predetermined lengthLH and width WH on the plane. The length LH and the width WH may beprovided to be similar or identical to a length and a diameter of a 20 Wfluorescent lamp or a 40W fluorescent lamp.

The optical member 100 may be any one of the optical members accordingto the embodiments previously described with reference to FIGS. 1 to 10.That is, the optical member 100 includes the base substrate and thethree-dimensional effect forming portion provided on the first surfaceof the base substrate. The three-dimensional effect forming portionincludes multiple main patterns that extend in the x-direction on thefirst and are sequentially arranged in the y-direction. Thanks to thisconfiguration, the optical member 100 may display the incident beam fromeach of two light source portions 30 as line-shaped beams GL1, GL2.

In the present embodiment, two line-shaped beams GL1, GL2 are displayedin areas different from each other of the single three-dimensionaleffect forming portion, and are displayed as three-dimensional effectbeams that extend in directions facing each other toward the centerportion at both ends of the length direction of the singlethree-dimensional effect forming portion and disappear at the centerportion.

Of course, when the optical member 100 is configured to include themultiple effect forming portion provided on the second surface of thebase substrate, the optical member 100 may be operated such that theline-shaped beams GL1, GL2 are expressed in a state of being dividedinto two line-shaped beams in a width direction of the optical member.

The light source portion 230 may be disposed to be attached to onesurface of the support member 210 in a plate form or to be separatedfrom the one surface of the support member 210 by a predetermineddistance. The light source portion 230 may be configured to include afirst light source and a second light disposed at both ends in a lengthdirection of the support member 210, respectively, so as to irradiate abeam having a light effective area of a hemispherical area toward acenter portion of the support member 20.

The first light source and the second light source are disposed toirradiate light in the directions facing each other. The first lightsource and the second light source may be disposed to irradiate lighttoward different directions while having an angle exceeding 90° but notexceeding 180° therebetween (see reference numeral 230 of FIG. 17).

In the present embodiment, the light source portion 230 may be providedwith any one of various existing light sources such as an incandescentlamp, a halogen lamp, a discharge lamp and the like or may be providedas indirect light sources such as a guide member and the like forguiding or reflecting natural light resulting from the sun. Also,according to some embodiments, the light source portion 230 may beprovided to include LED (Light Emitting Diode) elements. In this case,the light source portion 230 may include a printed circuit board inwhich an LED light source and a drive circuit supplying power to thelight source are installed.

The support member 210 may be at least a part of a housing of thelighting device 200, a wall inside and outside a building or one surfaceof a product or equipment. The support member 210 may be implementedusing devices or products without being specially limited thereto if thedevices or products enable an optical member 100 to be disposed at aplace where light of the light source portion 230 is irradiated. Forexample, the support member 210 may be implemented using a cap, clothingshoes, a bag, an accessory, indoor or outdoor interior components andthe like.

According to the present embodiment, the light irradiated from two lightsources to a central part of the support member 210 may be implementedas lighting of a line shaped beam in which the light starts from bothends of the support member 210 by the refraction and reflectionoperation of the multiple main patterns and disappears at the centralpart of the support member 210. Also, some embodiments, when themultiple effect forming portion disposed to overlap with thethree-dimensional effect forming portion is used, a single line shapedbeam with a three-dimensional effect may be converted in and displayedas multiple line shaped beams with a three dimensional effect.

FIG. 12 is a plan view showing a part of a lighting device according toanother embodiment of the present disclosure. FIG. 13 is a viewschematically showing an operational status of the lighting device ofFIG. 12.

For convenience of the description, the lighting device of FIG. 12 maycorrespond to a structure in which the multiple effect forming portionis removed from the lighting device of FIG. 17.

Referring to FIGS. 12 and 13, the lighting device according to thepresent embodiment is configured to include: a base substrate 10; athree-dimensional effect forming portion 11; and a light source portion230. An optical member is configured to include: the base substrate 10;and the three-dimensional effect forming portion 11.

The optical member of the present embodiment may be substantiallyidentical to the optical member previously described with reference toFIGS. 1 to 3 except for the fact that the three-dimensional effectforming portion 11 has multiple main patterns of multiple groups thatare sequentially arranged in different directions in multiple areas R1to R12 different from each other of the base substrate 10.

That is, the three-dimensional effect forming portion 11 is configuredto include 12 sub-three-dimensional effect forming portions arranged inareas R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12 differentfrom each other of the base substrate 10, respectively. Each of themultiple sub-three-dimensional effect forming portions may have a firstsub-main pattern to an nth sub-main pattern. Here, n is a natural numberof 2 or more.

The multiple sub-three-dimensional effect forming portions may beconfigured to include a first sub-three-dimensional effect formingportion and a second sub-three-dimensional effect forming portion. Forexample, the multiple sub-main patterns of the firstsub-three-dimensional effect forming portion and the multiple mainpatterns of the second sub-three-dimensional effect forming portion arearranged in different directions. In this case, each of the sub-mainpatterns of the multiple sub-three-dimensional effect forming portionsmay be provided to sequentially extend to the different areas in such amanner that respective pattern lines of the sub-main patterns from thefirst sub-three-dimensional forming portion of one side to the twelfthsub-three-dimensional forming portion of another side are connected toeach other at a boundary part of two adjacent sub-three-dimensionaleffect forming portions. At this time, the respective sub-main patternsmay have a bent portion at the aforesaid boundary part.

The light source portion 230 is configured to include 12 light sources230 a to 2301 irradiating a beam to the areas R1, R2, R3, R4, R5, R6,R7, R8, R9, R10, R11 different from each other of the base substrate 10.The respective light sources may be LED light sources. In the presentembodiment, the LED light source may be an LED package including two LEDelements and may be provided so that two beams can be emitted by therespective LED elements. The beams from the respective light sources arecontrolled as line-shaped beams by the main patterns 111 (correspondingto the sub-main patterns) of the respective areas. Here, an opticalwidth of the line-shaped beam may be below a width of a light emittingsurface of the corresponding light source irradiating the beams to themain patterns, and a length of the line-shaped beam may be larger thanthe optical width.

When the sub-main patterns of the multiple groups described above areused, line shaped beams D1 and the like extending in the same directionor line shaped beams D1 and the like extending from the same directionto directions crossing each other may be implemented by controlling theincident beams from the light sources irradiating beams in roughly ahemispherical shape based on the light sources in each areas. Also,according to some embodiments, line shaped beams D1, D2 extending inopposite directions or line shaped beams extending a direction having anangle of more than 90° and less than 180° from the opposite directions,namely directions crossing each other, may be implemented.

According to the present embodiment, by using the three-dimensionaleffect forming portion 11 provided on the base substrate 10 having alength L of the width direction of about 250 mm, the light of a whiteLED lamp of about 10 W may be implemented as a three-dimensional effectbeam or a line shaped beam with a three-dimensional effect in which theintensity of light of the light source becomes largely weak ordisappears at roughly the central part A0 in the width direction of thebase substrate 10.

FIG. 14 is a view regarding the operational status of the lightingdevice of FIG. 12.

Referring to FIG. 14, when the lighting device according to the presentembodiment is operated, light of each of the light sources is irradiatedfrom the edges of both sides in a width direction of the base substrate10 toward a central part (see A0 of FIG. 13), and is displayed as athree-dimensional effect beam traveling to the first path (D2 and thelike) in a predetermined optical width through the main patterns of eacharea of the base substrate 10.

In each area of the base substrate 10 in which the three-dimensionaleffect forming portion is provided, the three-dimensional effect beamsmay be implemented to have a specific first path (D2 and the like) andan optical width according to each pattern design of the main patterns.

According to the present embodiment, the beam passing along the basesubstrate 10 may be expressed by the sequentially arranged patterns onthe base substrate 10 as a three-dimensional effect beam in which theintensity of light reduces rapidly and disappears at a very relativelyshort distance (for example, about 100 to 200 mm). Here, the very shortdistance corresponds to a short distance beyond ‘1/(hundreds tothousands of’ times compared to a distance (for example, several metersto tens of meters) in which light passing along a transparent substrateis naturally reduced and disappears when the light is irradiated to thetransparent substrate (corresponding to the base substrate) of acomparative example in which main patterns are not provided.

Meanwhile, in the present embodiment, it is illustrated that each of thelight sources of the lighting device irradiates two beams by using theLED package having two LED elements as the light sources, but thepresent disclosure is not limited to such a configuration. Each of thelight sources may irradiate one beam by using the LED package having oneLED element as the light sources.

FIG. 15 is a graph in which brightness of the lighting device of FIG. 12is measured. The graph of the present embodiment shows the brightnessmeasured by disposing a brightness measuring device in a front centerportion of the lighting device of FIG. 12.

Referring to FIG. 15, when the intensity of light of the light source ismaximally Lu12, it can be seen that a first brightness (about Lu5) shownin an intermediate area A0 of the front of the light emitting surface ofthe lighting device is relatively largely small compared to a secondbrightness (about Lu7 to about Lu12) shown in the other areas of thefront of the light emitting surface. In particular, when considering thefact that the first brightness of the intermediate area A0 is influencedby the second brightness of the other areas of the periphery, it can bepredicted that the intensity of light of the light emitting surfacecorresponding to the intermediate area A0 in the lighting device isreally close to 0.

The reason why the measurement results of the graph are shown is becausethe beams passing along the base substrate are sequentially refractedand reflected from the main patterns of the three-dimensional effectforming portion in a the first direction. When this principle is used,optical images (line shaped beams, the three-dimensional effect beam andthe like) having desired shapes may be implemented through a patterndesign.

FIG. 16 is a perspective view of a lighting device according to afurther embodiment of the present disclosure. FIG. 17 is a plan view ofthe lighting device of FIG. 16.

Referring to FIGS. 16 17, a lighting device 300 according to the presentembodiment is configured to include: the base substrate 10; thethree-dimensional effect forming portion 11; the multiple effect formingportion 12; and the light source portion 230.

The lighting device 300 of the present embodiment may be substantiallyidentical to the lighting device of FIG. 12 except for the fact that themultiple effect forming portion 12 is disposed on one surface (thesecond surface) of the base substrate 10. Accordingly, when explainingthe constitutive elements of the lighting device 300 of the presentembodiment, the detailed description on the constitutive elementssimilar or identical to those of the lighting device of FIG. 12 isomitted in order to avoid overlapping.

The multiple effect forming portion 12 is configured to include opticalpatterns (see reference numeral 121 of FIG. 1). In the presentembodiment, the multiple effect forming portion 12 includes sub-opticalpatterns of multiple groups arranged in a lamination structure withrespective sub-main patterns of the three-dimensional effect formingportion 11 disposed in areas R1, R2, R3, R4, R5, R6, R7, R8, R9, R10,R11 and R12 different from each other. The multiple effect formingportion 12 may include 12 sub-multiple effect forming portions disposedin the areas different from each other of the base substrate 10,respectively. Each of the sub-multiple effect forming portion may havethe first optical pattern to an nth optical pattern. Here, n is anatural number of 2 or more.

The multiple sub-multiple effect forming portions may be configured toinclude a first sub-multiple effect forming portion and a secondsub-multiple effect forming portion. In this case, the multiple opticalpatterns of the first sub-multiple effect forming portion and themultiple optical patterns of the second sub-multiple effect formingportion may be arranged in different directions. Also, when viewed on apredetermined plane by projecting the optical patterns, an arrangementdirection of the optical patterns of the respective sub-multiple effectforming portions may be provided to extend in a direction that crossesan arrangement direction of the main patterns of the respectivethree-dimensional effect forming portions corresponding thereto or meetsat right angles to the arrangement direction of the main patterns.

According to the present embodiment, by converting a singlethree-dimensional effect beam (or a single line-shaped beam) havingperceptional depth in a thickness direction of the base substrate 10 andreflected from the uneven patterns of the three-dimensional effectforming portion 11 using the lamination structure of thethree-dimensional effect forming portion 11 and the multiple effectforming portion 12 provided on both surfaces, respectively, having apredetermined width, direction and length L, a first three-dimensionaleffect beam traveling to the right of the single three-dimensionaleffect beam and a second three-dimensional effect beam traveling to theleft of the single three-dimensional effect beam may be expressed.

FIG. 18 is a cross-sectional view for explaining the principles ofgenerating of a single line-shaped beam or three-dimensional effectbeam. FIG. 18 may correspond to a partially enlarged cross-sectionalview of a cross section of the lighting device of FIG. 16 taken alongline XVIII-XVIII.

Referring to FIG. 18, the lighting device 300 according to the presentembodiment is configured to include: the base substrate 10; thethree-dimensional effect forming portion 11 provided on the firstsurface of the base substrate 10; and the multiple effect formingportion (12) provided on the second surface of the base substrate 10.The three-dimensional effect forming portion 11 includes multiple mainpatterns (see reference numeral 111 of FIG. 1), and the multiple effectforming portion 12 includes multiple optical patterns (see referencenumeral 121 of FIG. 1).

The three-dimensional effect forming portion 11 of the presentembodiment is provided by bonding a separate uneven pattern substrate110 to the first surface of the base substrate 10, but is not limitedthereto. Like the optical member 100 of FIG. 1, the three-dimensionaleffect forming portion may be provided in a form in which a part of thefirst surface of the base substrate 10 is removed. Also, the multipleeffect forming portion 12 is provided by bonding a separate opticalpattern substrate 120 to the second surface of the base substrate 10,but is not limited thereto. Like the optical member 100 of FIG. 1, themultiple effect forming portion may be provided in a form in which apart of the second surface of the base substrate 10 is removed.

According to the lighting device 300 of the present embodiment, when thethree-dimensional effect forming portion (11)(corresponding to thesub-three-dimensional effect forming portion) of each area (see R1 toR12 of FIG. 17) of the base substrate 10 is divided into a first areaA1, a second area A2 and a third area A3 according to a distance fromthe light source (see LS of FIG. 3) placed at a predetermined positionresulting from going back to the direction in which the light BL isirradiated, the light induced into an arrangement direction of the mainpatterns 111 while passing along the three-dimensional effect formingportion 11 is refracted and reflected in a thickness direction of thebase substrate 10 by the main patterns.

In this case, since the main patterns of the first area A1 arepositioned at the nearest distance from the light sources, the mainpatterns have refraction and reflection efficiency of the highest level,and serve as indirect light sources of a first luminous intensity; sincethe main patterns of the second area A2 are positioned after the mainpatterns of the first area A1 in a traveling direction of the light BL,the main patterns have refraction and reflection efficiency of a middlelevel smaller than the level of the main patterns of the first area A1and serve as indirect light sources of a second luminous intensitysmaller than that of the first luminous intensity; and since the mainpatterns of the third area A3 reflect and refract the light passingalong the main patterns of the first area A1 and the second area A2, themain patterns have refraction and reflection efficiency of a levelsmaller than the level of the main patterns of the second area and serveas indirect light sources of a third luminous intensity smaller thanthat of the second luminous intensity.

According to the aforesaid three-dimensional effect forming portion 11,as viewed from a specific standard point or an observing point, the mainpatterns positioned farther away from the light sources in main movingdirections of light or in the first path may serve as indirect lightsources for emitting the light of the light sources positioned fartheraway from the main patterns. That is, the main patterns serve asindirection light sources have a perceptional depth or a sense ofdistance in a form in which the light enters the base substrate 10 inthe thickness direction of the base substrate 10 of the first path,thereby expressing three-dimensional effect beams having luminousintensity B11, B12, B13 showing a sequential reduction in the intensityof light.

Also, according to the lighting device 300 of the present embodiment,the light from the main patterns of the three-dimensional effect formingportion 11 toward the multiple effect forming portion 12 is divided intotwo beams in the thickness direction of the base substrate 10 throughthe optical patterns of the multiple effect forming portion 12. Theoptical patterns may correspond to sub-optical patterns. That is, themultiple effect forming portion 12 may convert a singlethree-dimensional effect beam B11, B12, B13 of the three-dimensionaleffect forming portion 11 into a first three-dimensional effect beamB21, B22, B23 and a second three-dimensional effect beam B31, B32, B33.

According to the present embodiment, the lighting device 300 may expressthe single three-dimensional effect beam as the first three-dimensionaleffect beam and the second three-dimensional effect beam havingperceptional depths which become higher in order according to anincrease in the distance from the light sources.

FIG. 19 is a cross-sectional view for explaining the principles ofgeneration of multiple line-shaped beams or three-dimensional effectbeams in each area of the lighting device of FIG. 16.

FIG. 19 may correspond to a schematically enlarged cross-sectional viewof a cross section of the lighting device of FIG. 16 taken along line-.Also, the lighting device of FIG. 19 may be configured to includesubstantially the same constitutive elements as those of the lightingdevice of FIG. 18 except for the fact that a position of the crosssection is different therefrom.

Referring to FIG. 19, in a lighting device 300 according to the presentembodiment, a three-dimensional effect beam B11 refracted and reflectedfrom the main patterns 111 of the three-dimensional effect formingportion 11 and traveling to the multiple effect forming portion 12 isconverted into multiple three-dimensional effect beams B2, B3 by theoptical patterns 112 of the multiple effect forming portion 12.

That is, the first incident beam B11 traveling in a first direction maybe converted into first emitting beams B21, B2 traveling in a seconddirection at the right of the first incident beam B11 from the opticalpattern 112 of the multiple effect forming portion 12 and secondemitting beams B31, B3 traveling in a third direction at the left of thefirst incident beam B11.

According to the present embodiment, a thickness of the optical member(or the lighting device) provided in a lamination structure of theuneven pattern substrate 110 including the base substrate 10, and thethree-dimensional effect forming portion 11 and the optical patternsubstrate 120 including the multiple effect forming portion 12 may rangefrom about 25 to 250 μm in the case of a sheet or film structure whichenables roll winding, and may be larger than 250 μm and about 500 μm orless in the case of a plate structure which does not enable rollwinding.

When the thickness t2 of the optical member is thinner than 25 μm itwill be difficult to express perceptional depth of the three-dimensionaleffect beam. Also, when the thickness t2 of the optical member isthicker than 500 μm as the optical member used in the lighting device ofa plate form, a weight thereof may be increased, and costs incurred forproducing the optical member to be transparent may be increased.

A thickness of each main pattern 111 of the three-dimensional effectforming portion 11 may be about several μm or more and about tens of μmor less. When the thickness of each main pattern 111 is smaller thanseveral μm it will be difficult to process the main patterns, and whenthe thickness thereof exceeds tens of μm each main pattern itself isincreased in size so that the degree of freedom in design can be limitedand a bad influence can be exerted on the implementation of athree-dimensional effect beam.

Also, a thickness of each optical pattern 121 of the multiple effectforming portion 12 may be similar or identical to that of each mainpattern 111. The thickness of each main pattern 111 and the thickness ofeach optical pattern 121 may be calculated in a thickness resulting fromsubtracting a thickness t1 of the base substrate from a thickness t2 ofthe optical member.

In the present embodiment, when the thickness t1 of the base substrate10 is smaller than a height of the light emitting surface of the lightsource portion corresponding to this thickness, the base substrate 10fails to serve as a light guide member for guiding light through totalinternal reflection.

FIG. 20 is a plan view schematically showing an operational status ofthe lighting device of FIG. 16. FIG. 21 is a view regarding anoperational status of the lighting device of FIG. 16.

Referring to FIGS. 20 and 21, in the lighting device 300 according tothe present embodiment, an incident beam from the light source 230 isprimarily converted into a single three-dimensional effect beam (seeB11, B12, B13 of FIG. 18) by the three-dimensional effect formingportion and the multiple effect forming portion which are disposed to belaminated, and the converted single three-dimensional effect beam issecondarily converted into multiple three-dimensional effect beams B2,B3.

In the present embodiment, the multiple three-dimensional effect beamsB2, B3 are expressed in a form in which the beams travel in two specificdirections X2, X3. At this time, when the multiple effect formingportion is removed, the lighting device 300 expresses a singlethree-dimensional effect beam traveling in roughly a intermediatedirection (see D2 of FIGS. 13 and 14) of two directions X2, X3.

According to the present embodiment, the single three-dimensional effectbeam may be expressed as the multiple three-dimensional effect beamsusing the three-dimensional effect forming portion and the multipleeffect forming portion. That is, according to the present embodiment,the lighting device having a high degree of freedom in design andcapable of providing an aesthetic impression to the user can beefficiently designed and produced. Also, as various colors of the LEDlight sources are used, the lighting device capable of producing anatmosphere suitable for an illumination installation place, a learningenvironment or a working environment may be implemented.

FIG. 22 is a cross-sectional view of a lighting device of yet anotherembodiment of the present disclosure.

Referring to FIG. 22, a lighting device 400 according to the presentembodiment is configured to include: the base substrate 10; thethree-dimensional effect forming portion 11; the multiple effect formingportion 12; the light source portion 230; and a support member 410. Theoptical member 100 is configured to include: the base substrate 10; thethree-dimensional effect forming portion 11 and the multiple effectforming portion 12.

In the present embodiment, the optical member 100 may be provided usingany one of the optical members according to the embodiments previouslydescribed with reference to FIGS. 1 to 10. In the present embodiment,the optical member 100 is provided in a film form. A thickness of theoptical member 100 is about 25 to 250 μm or less. When the thickness ofthe optical member 100 is smaller than 25 μm it may be difficult toproduce the optical member and durability may be largely reduced. Also,when the thickness of the optical member 100 is larger than 250 μmflexibility is reduced, so that it may be difficult to install theoptical member at the support member 410 having a predeterminedcurvature.

The light source portion 230 is disposed so as to irradiate light to oneside of the optical member 100. The light source portion 230 may beprovided as an LED package or an LED string including one or two or moreLED elements. When the light source portion includes multiple LEDelements, the single line-shaped beam (or the single three-dimensionaleffect beam) including multiple beams may be expressed as multipleline-shaped beams (or multiple three-dimensional effect beams) by theoptical member 100.

The support member 410 may be a housing having a curvature, a wallinside or outside a building having a bent portion, or one surface of aproduct. In the present embodiment, the support member 410 has a hollowtype cylindrical shape having a predetermined diameter 2R.

If any device or product enables the optical member 100 of a sheet phaseto be disposed at a place where light of the light source portion 230 isirradiated to one side, the support member 410 may be implemented by thedevice and product without being specially limited. Furthermore, thesupport member 410 may be implemented using a circular or hollow cap,clothing, shoes, a bag, an accessory, indoor and outdoor interiorcomponents and the like.

According to the present embodiment, the optical member is attached toan application product, a product or a building having a curvature sothat illumination of various optical designs can be implemented throughthe line shaped beams or the line shaped beams with thethree-dimensional effect.

FIG. 23 is a plan view of a lighting device of still another embodimentof the present disclosure.

Referring to FIG. 23, a lighting device 500 according to the presentembodiment is configured to a base substrate 10; the three-dimensionaleffect forming portion 11 and the multiple effect forming portion 12provided on both surfaces of the base substrate 10; the light sourceportion 230; and an outer lens 510. When the lighting device 500 is usedfor car illumination, the light source portion 230 may be operated bypower supplied from a car battery 520.

The optical member 100 is configured to include: the base substrate 10;the three-dimensional effect forming portion 11; and the multiple effectforming portion 12. The optical member 100 is configured to include aplurality of sub-three-dimensional effect forming portions and aplurality of multiple effect forming portions which are arranged inindividual directions, respectively in different areas of the basesubstrate 10. Also, the optical member 100 may be bonded to one surface(an inner side) of the outer lens 30 having a curvature or may beseparated by a predetermined distance.

In the present embodiment, the optical member 100 may be provided usingany one of the optical members of the embodiments previously describedwith reference to FIGS. 1 to 10. Also, the optical member 100 may be maybe provided using any one of the optical members of the embodimentspreviously described with reference to FIGS. 12 to 22.

The light source portion 230 is provided so as to irradiate light todifferent areas of the optical member. The light source portion 230includes multiple light sources, and each of the light sources may be anLED package including one or two or more LED elements.

The outer lens 510 includes to a lens-shaped cover disposed on an outersurface of the lighting device such as a light device for a vehicle (aheadlight, a rear light and the like), an outdoor lighting device andthe like. When the outer lens is used in vehicles, the outer lens 510may be provided on one surface, in which the optical member 100 isdisposed, so as to have a curvature leading to a curved surface of avehicle body. The outer lens 510 may be made of a transparent plasticmaterial, for example, engineering plastic and the like. The lightingdevice for vehicles may include a headlight, a rear light, car indoorillumination, a fog lamp, a door scarf or the like. In this case, interms of a volume, a thickness, a weight, a price, a life span,stability, a degree of freedom in design, and easiness of installation,the lighting device 500 of the present embodiment may be usefullyapplied compared to the existing lamps for vehicles.

Meanwhile, the lighting device 500 of the present embodiment is notlimited to a lighting device for vehicles, and may be applied to a curveportion or a bent portion inside or outside an object for illustrationinstallation, such as a building, equipment, furniture and the like, asa flexible lighting device in a film form. In this case, the outer lens510 may be a transparent support member or a housing for supporting theoptical member 100 or the light source portion 230.

According to the present embodiment, by guiding the light of therespective light sources into the first path (D1 and the like) through acombination of the three-dimensional effect forming portion and themultiple effect forming portion provided in different areas,respectively of the optical member, a single three-dimensional effectbeam limited to a predetermined optical width and having a perceptionaldepth in the thickness direction of the optical member may be displayedas multiple three-dimensional effect beams twice as many number as thelight sources.

Also, the present embodiment may provide the lighting device capable ofexpressing multiple three-dimensional effect beams traveling along theextension directions of the main patterns according to movement of anobserving point of a user or an observation instrument.

FIG. 24 is a partially cross-sectional view of an optical memberaccording to a further embodiment of the present disclosure.

Referring to FIG. 24, an optical member 100B according to the present isconfigured to include a base substrate 10; an uneven pattern substrate110 having a three-dimensional effect forming portion 11; an opticalpattern substrate 120 having a multiple effect forming portion 12; afirst adhesive layer 140 for bonding the uneven pattern substrate 110 toa first surface of the base substrate 10; and a second adhesive layer150 for bonding the optical pattern substrate 120 to a second surface ofthe base substrate.

According to the present embodiment, the optical member 100B may besimilar to or substantially identical to the optical members of thelighting devices previously described with reference to FIGS. 11 to 23except for the first adhesive layer 140 and the second adhesive layer150. That is, the base substrate 10, the three-dimensional effectforming portion 11 and the multiple effect forming portion 12 of theoptical member 100B are similar to or substantially identical to thoseof the optical members of the respective lighting devices according tothe embodiments described above, and accordingly, the detaileddescription thereof is omitted.

The uneven pattern substrate 110 and the optical pattern substrate 120may be made of a thermoplastic resin or a photocurable resin. A materialof each of the uneven pattern substrate 110 and the optical patternsubstrate 120 may be polycarbonate, polymethylmethacrylate, polystyreneor polyethylene terephthalate.

The first adhesive layer 140 may be formed with an epoxy adhesive film,and the like. Also, in order to adjust a refractive index, the firstadhesive layer 140 may be implemented using PEA ((Phenoxyethyl Acrylate)which is a high refractive material. Also, the first adhesive layer 140may be implemented with a fluorinate polymer, a fluorinate monomer andthe like. The second adhesive layer 150 may be made of an adhesivematerial which is identical to or different from that of the firstadhesive layer 140.

According to a thickness of the first adhesive layer 140 or the secondadhesive layer 150, the base substrate 10 and the optical patternsubstrate 120 may be separated from each other. In this case, it ispreferable that a spaced distance therebetween be below several mm inorder to efficiently implement a line-shaped beam or a three-dimensionaleffect beam.

Meanwhile, when the first adhesive layer 140 is prepared, a refractiveindex of each of the base substrate 10 and the uneven pattern substrate110 may be considered. That is, a refractive index of the first adhesivelayer 140 may be larger than each of the refractive index of the basesubstrate 10 and the refractive index of the uneven pattern substrate110. In this case, when a difference between the refractive index of thebase substrate 10 and the refractive index of the uneven patternsubstrate 110 is small, light passing through the first adhesive layer140 from the base substrate 10 is refracted at a predetermined angle andis refracted in an opposite direction of the predetermined angle whiletraveling to the uneven pattern substrate 110 again, thereby travellingin a direction similar to an original traveling direction. Of course,when the thickness of the first adhesive layer 140 is very thin, theaforesaid refraction angle may be disregarded.

Moreover, it is preferable for the first adhesive layer 140 to use amaterial having very low reflection efficiency between the basesubstrate 10 and the uneven pattern substrate 110. If it is not, a badinfluence may be exerted on the generation of a three-dimensional effectbeam by the three-dimensional effect forming portion 11.

Accordingly, the present embodiment may provide the lighting devicecapable of being used to a design lighting device and a flexibleapplication product used in indoor or outdoor general lighting devices,exhibitions and the like and the lighting device capable of expressingoptical images having excellent appearance which can be efficientlyapplied to a lighting device for vehicles and the like.

As set forth above, some embodiments of the present disclosure mayprovide the optical member capable of implementing optical images havingdesired shapes by controlling an optical path, an optical width andluminous intensity through a pattern design, and the light device usingthe optical member.

Also, some embodiments of the present disclosure may provide the opticalmember capable of converting a single optical image having athree-dimensional effect into multiple optical images having athree-dimensional effect through a pattern design, and the lightingdevice using the optical member.

As previously described, in the detailed description of the disclosure,having described the detailed exemplary embodiments of the disclosure,it should be apparent that modifications and variations can be made bypersons skilled without deviating from the spirit or scope of thedisclosure. Therefore, it is to be understood that the foregoing isillustrative of the present disclosure and is not to be construed aslimited to the specific embodiments disclosed, and that modifications tothe disclosed embodiments, as well as other embodiments, are intended tobe included within the scope of the appended claims and theirequivalents.

An aspect of embodiments of the present disclosure provides an opticalmember and a lighting device using the same capable of implementingoptical images having a desired shape by controlling an optical path, anoptical width and luminous intensity through a pattern design.

Another aspect of embodiment of the present disclosure may provide anoptical member and a lighting device using the same capable ofconverting a single optical image having a three-dimensional effect intoa plurality of optical images having the three-dimensional effectthrough a pattern design and expressing the converted optical images.

In order to solve the above problems, according to an aspect of thepresent disclosure, an optical member may include: a base substrate; athree-dimensional forming portion provided on a first surface of thebase substrate; and a multiple effect forming portion disposed in alamination shape with three-dimensional effect forming portion. Here,three-dimensional effect forming portion may include multiple mainpatterns sequentially arranged on the first surface of the basesubstrate in a first direction and having inclined surfaces with eachinclination angle. The multiple main patterns may implement aline-shaped beam of a first path which crosses the respective patternextension directions of the multiple main patterns by guiding anincident beam into a first surface direction toward which a firstsurface looks or a second surface direction toward which a secondsurface opposite to the first surface looks by using refraction andreflection of the respective inclined surfaces. The multiple effectforming portion may be sequentially arranged in a second directioncrossing a first direction and may have multiple optical patterns forconverting the line shaped beam of the first path into multiple lineshaped beams.

Any reference in this specification to “one embodiment,” “anembodiment,” “example embodiment,” etc., means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment of the disclosure. Theappearances of such phrases in various places in the specification arenot necessarily all referring to the same embodiment. Further, when aparticular feature, structure, or characteristic is described inconnection with any embodiment, it is submitted that it is within thepurview of one skilled in the art to effect such feature, structure, orcharacteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

What is claimed is:
 1. An optical member, comprising: athree-dimensional effect forming portion provided on a first surface ofa base substrate; and a multiple effect forming portion disposed in alamination form with the three-dimensional effect forming portion;wherein the three-dimensional effect forming portion has multiple mainpatterns sequentially arranged in a first direction on the first surfaceand having respective inclined surfaces with an inclination angle withrespect to the first surface, wherein the multiple main patternsimplement a line shaped beam of a first path crossing at right angles torespective pattern extension directions of the multiple main patterns byguiding a first incident beam into a first surface direction towardwhich the first surface looks or a second surface direction toward whicha second surface of the base substrate opposite to the first surfacelooks, through refraction or reflection from the inclined surfaces,wherein the multiple effect forming portion are sequentially arranged ina second direction crossing the first direction and has multiple opticalpatterns for converting the line shaped beam of the first path intomultiple line shaped beams.
 2. The optical member of claim 1, whereinthe multiple main patterns serve as indirect light sources in whichoptical paths become sequentially longer as a distance from lightsources increases gradually, thereby creating a three-dimensional effectbeam in a thickness direction of the base substrate.
 3. The opticalmember of claim 2, wherein the multiple main patterns comprise firstpatterns, second patterns and third patterns sequentially arranged fromthe light source, wherein a second optical path of the second patternsis longer than a first optical path of the first patterns and is smallerthan a third optical path of the third patterns, and a second distancefrom a second dummy light source of the light source by inclinedsurfaces of the second patterns to the inclined surfaces of the secondpatterns is longer than a first distance from a first dummy light sourceof the light source by inclined surfaces of the first patterns to theinclined surfaces of the first pattern and is shorter than a thirddistance from a third dummy light source of the light source by inclinedsurfaces of the third patterns to the inclined surfaces of the thirdpatterns.
 4. The optical member of claim 1, wherein the multiple mainpatterns implement a line shaped beam displayed by traveling along thepattern extension directions in a direction opposite to a movementdirection of a standard point or an observing point according tomovement of the standard point or the observing point.
 5. The opticalmember of claim 1, wherein the inclined surface is a mirror-likefinishing surface.
 6. The optical member of claim 5, wherein theinclined surface has an arithmetic mean roughness (Ra) of 0.02 or lessand a maximum height roughness (Ry) of 0.30 or less.
 7. The opticalmember of claim 5, wherein an inclination angle of the inclined surfaceis larger than 5° and smaller than 85° based on the first surface or aline or a surface crossing the first surface.
 8. The optical member ofclaim 1, wherein the multiple effect forming portion is provided on thesecond surface.
 9. The optical member of claim 8, wherein thethree-dimensional effect forming portion is provided in a form in whicha part of the first surface is removed, or is provided as a main patternsubstrate bonded to the first surface.
 10. The optical member of claim9, wherein the multiple effect forming portion is provided in a form inwhich a part of the second surface is removed, or is provided as anoptical pattern substrate bonded to the second surface.
 11. The opticalmember of claim 10, wherein a difference in a refractive index betweenthe base substrate and the main pattern substrate, or a different in arefractive index between the base substrate and the optical patternsubstrate is 0.2 or less.
 12. The optical member of claim 1, wherein themultiple effect forming portion is provided on the three-dimensionaleffect forming portion.
 13. The optical member of claim 12, wherein thethree-dimensional effect forming portion is provided in a form in whicha part of the first surface is removed, or is provided as a main patternsubstrate bonded to the first surface.
 14. The optical member of claim13, wherein the multiple effect forming portion is provided an opticalpattern substrate disposed to be separated from the three-dimensionaleffect forming portion.
 15. The optical member of claim 1, wherein thebase substrate is a transparent substrate in a plate or film form havinga haze of 2% or less.
 16. The optical member of claim 1, wherein thethree-dimensional effect forming portion comprises first sub-mainpatterns and second sub-main patterns provided in different areas of afirst surface of the base substrate, and creates single line shapedbeams extending in different directions via the first sub-main patternsand the second sub-main patterns.
 17. The optical member of claim 16,wherein the multiple effect forming portion comprises first sub-opticalpatterns disposed in a lamination form with the first sub-main patternsand second sub-optical patterns disposed in a lamination form with thesecond sub-main patterns, and converts the single line shaped beams intomultiple line shaped beams, respectively through the first sub-opticalpatterns and the second sub-optical patterns.
 18. A lighting device,comprising: an optical member of claim 1; and a light source portionirradiating light to the optical member.
 19. The lighting device ofclaim 18, wherein the light source portion comprises a first lightsource and a second light source, wherein the first light source and thesecond light source irradiate the light from the same direction todirections parallel to each other, or irradiate the light from the samedirection to directions crossing each other.
 20. The optical member ofclaim 18, wherein the light source portion comprises a first lightsource and a second light source, where the first light source and thesecond light source irradiate the light from opposite directions to astraight line direction or directions parallel to each other, orirradiate the light to different directions having an angle of more than90° and less than 180° between the first light source and the secondlight source.